Marking the flaps and the films for photographic film packs



Feb. 24, 1942. A. MILLER ETAL 2,274,556

MARKING THE FLAPS AND THE FILMS FOR PHOTOGRAPHIC FILM PACKS Filed June 26, 1959 AU'RED M/LLB? 50am) saw/771,5?

N NT,OR

ATTORNEY Patented Feb. 24, 1942 MARKING 'rnr. mes AND 'rm: mus 1m rno'rocasrnrc mm PACKS Alfred Miller, Dessau, and Eduard Schnitsler, Wolfen, Kreis Bltterfeld, Germany, alsignors, by mesne assignments, to General Aniline & Film Corporation, New York, N. Y., a corporation of Delaware Application June 28, 1939, Serial No. 281,216 In Germany June 27, 1938 2Clalms.

Our present invention relates to improvements in marking the fiaps and the films for a photographic film-pack.

Hitherto the flaps which are used for making up film-packs have been printed with running numbers, for instance 1-12, before sticking them to the respective films of the film-pack and have been arranged in the dark room in the order in which they are to be attached by adhesive to the several films. The individual films on the other hand have been marked optically by transferring the flap number printed on the head of the fiap with a reflecting substance, for instance aluminium bronze, and illuminated by a lamp. with the aid of an episcope in the sticking ma-, chine and generally on to the lower edge of the respective film. Instead of printed fiap numbers there are also used fiaps in the head of which the respective fiapnumber is marked by perforations. The perforated number is also transferred optically and with the suitable reduction of scale to the film.

This mode of working has the disadvantage that the fiaps before they are stuck to the films must be provided with the printed number and be sorted in accordance with the numbers which .is somewhat laborious.

Our invention avoids these latter operations by marking and sticking together the fiaps and the films in one operation, for instance in an automatic sticking machine (see for instance German Patents Nos. 600,344 and 600,954). The marking of the films and the flaps may be effected by stamping with any known stamping mechanism (see for instance U. 8. Patent No. 2,007,135). In order positively to ensure agreement between the fiap number and the film number, the mechanism for stamping the fiap may be coupled mechanincanllv or electrically with that for stamping the The single figure of the accompanying shows one form of practical mechanism for car- 'rying out the method of the present application.

As shown in the drawing. the film sheet 4 is placed on one end of the fiap 5. An adhesive strip I is positioned over the film and fiap at the point where they are to be fastened together. The adhesive strip is pressed firmly into position by the block element 3 when said element moves in the direction of the arrow. During this pressing or fastening movement, the film sheet 4 is stamped with a suitable number by the marking or stamping element i. At the same time, a second stamping element 2 impresses the same number on the fiap 5. The agreement between the flap number and the film number is insured by coupling the two stamping elements to each other as well as to the pressing element 3.

It is of special advantage to stamp the flap number on a ground which is a good reflector, for example on a background of bronze in order to make it possible easily to distinguish the number by the light of the dark-room owing to the satisfactory difierentiai reflection between the stamped number and the background.

We claim:

1. In a process for marking the flaps and the films to be stuck together with said flaps for a photographic film-pack, the improvement which comprises stamping indicating marks on said fiaps, stamping corresponding marks on said films, and sticking together said flaps and said 80 film's, said stamping and sticking being conducted in one operation.

2. A process for marking and Joining the fiaps and the films for a photographic film pack, which comprises the steps of placing a film sheet on a protective fiap, pressing an adhesive strip on'said film and fiap for holding the film in place on said fiap, stamping an indicating number on said fi'ap, and stamping a like number on said film, said pressing and stamping steps taking place 40 simultaneously in a single operation.

ALFRED MILLER. EDUARD BCHNITZIER. 

